Rest

Data time: 3/12/2026 4:00 AM ET

Monitoring Site

Location
Address:	Frederick Co. Public School Maintenance Dept.
Latitude:	39.28101
Longitude:	-78.08157
Region:	Valley

Air Quality Information
Pollutant	Concentration	Units of Measure
Ozone	26	PPB
PM10	16	UG/M3
PM2.5	0.9	UG/M3

Historical Data Concentration

Hour	AQI	Class	Program	Responsible Pollutant	Activity Caution	Risk Groups
04:00	24	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
04:00	15	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
04:00	5	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
03:00	24	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
03:00	15	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
03:00	8	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
02:00	25	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
02:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
02:00	14	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
01:00	22	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
01:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
01:00	18	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.
00:00	23	Good	Ozone	Ozone	None	Children and people with asthma are the groups most at risk.
00:00	16	Good	PM10	PM10	None	People with respiratory disease are the group most at risk.
00:00	22	Good	PM2.5	PM2.5	None	People with respiratory or heart disease, the elderly and children are the groups most at risk.